Window latch



H. T. wALToN WINDOW LATCH Nov. 1, 1932.

' Filed May 21, 1930 IIIII A TTORNEYS.

Patented Nov. 1, 1932 .UNITED s-rA'rEs PA'IENE .ori-"ies HowAEn T.WAL'roN, yorcoLLINGrswoon, NEW JERSEY, AssIeNoE ro nAvID LUProNs soNsCOMPANY, oP PHILADELPHIA, PENNSYLVANIA, A coEPoEArIoN or PENN-r SYLVANIAwINnoW LA'rcPI i Application led May 21, 1930. VSerial'N'o. 454.3209.Y u

tom horizontal 11 lof'the frame 10. The.

This invention relates to window latches, and has more -especialreference to latches designed for use with windows whereof the sashesare pivoted, as distinguished from windows of the sliding` sash type.

rIhe purpose of my invention is to provide a neat, compact and eiiicientlatch for pivot sash windows, which is simple in construction; easy tomanipulate; and which aiiords la a grasp means for swinging the pivotedsash incident to opening and closing it.

In certain 'orms o-embodiment` such as hereinafter described, myimproved latch is particularly advantageous with windows wherein amultiplicity of continuously co I ordinated sashes are mounted onJfrictionY hingesand entail expenditure of considerable effort to openand close them simultaneously. v

.In the drawing hereunto attached, Fig. I is a Jfragment-ary verticalsectional view of a pivot sash window fittedk with a latch embodying myinvention.

Y Fig. II shows the latch as it appears when viewed as indicated bythearrows II-II in Fig. III is an illustration similar to Fig. I,showing an alternative embodiment of my Y invention.

Fig. IV is an elevation of the latch of Fig. III, viewed in thedirection of the arrows IV-fIV thereon, with portions broken out and insection to'better illustrate certain details ofconstruction, and,

Fig. V is a view in part corresponding to Fig. I, but showing stillanother modification oi my invention.

Referring first to Figs. I and II of the drawing, I'have shown forconvenience in illustrating my invention, a window con! structed whollyof metal with a stationary framelO whereot1 the lower horizontal rail 11is of T-cross section; andwith a multiplicity of sashes 12 which arearranged to swing upwardly about their top edges, and whereof the.bottom horizontal swinging rail or edge 13 in eachinstance is of Z crosssection and closes against the top horizontal 14 of the sash immediatelybeneath it, said top horizontal being of Tcross sectionlike thebotsashes 12 are hung,'in the present instance, on friction hinges 15,and `coordinated for simultaneous operation Lby a couplingrod 16 havingpivotal connection at'17 with arms 18 that project laterally from themovable components of said hinges. A Window of the describedconstruction, i. e., -with vertically narrow sashes 12,.isespeciallysuited orasylums, hospitals, detention houses, etc,

et 21, is adapted to loc over a keeper block 24E attached tothe bottomrail 11 of the window frame 10 by screws 25. The actuating member 26forV the bolt 23 has the form of a lever'with ulcrum support, betweenprojecting ears 27, of the bracket 21, on a transverse axis pin 28. FromFig. I it will be noted` that the actuating member 26 is providedwith anumberof gear teeth 29 which are concentrically arranged in respect tothe fulcrum axis'28 andmesh with rack teeth 30 onthebolt 23. It will.further be noted that the proportioning of the actuating member 26l issuch that an effective leverageis afforded to rendertheV operation ofthe bolt 23 very easy. in locking and .unlocking the window sash 12. 'Inaddition to functioning in the capacity just explained theactuatingmember 26,V for the bolt 237 is :intended to serve i as a handle to movethe lower sash l2, it being accordingly provided at the outer end with atransverse grasp bar 31. .No-rmally, with the window. sash 12 locked,the actuating member 26 lies substantially parallel to the plane of thelower sash12 out of the way, the limit of upward movement Vof saidmember to locking ypositionA being-determined rIto 5 its fulc'rum axis28 to horizontal position with attendant lifting of the latchbolt 23 toclear the keeper block 24 on the window frame 10, the lowermost sash 12beingthus freed so that it may be. swungoutward to in Fig. I. Throughthe coupling rod 16, corresponding movement is communicatedn to all theother sashes 12 of: the windowstructure. Now since the sashes 12 are allhung on friction hinges '15, thev expenditure of considerable eii'ortisv entailed totopen and close the window; butby reason of theliberalproportioning of the latch Vactuating' member 26 and provision thereonof the grasp 31, the impartation of the required thrust and pull isgreatly facilitated. It will moreover be noted that since the actuatingmember 26 occupies a-horizontal'position after release of the latch 23,only a small opening-just suiiicient toV permit passage of the hand-isrequired in the screen 19. l

In Figs. III and IV, I have shown a modified embodiment of my improvedlatch which4 `may be used in lieu of the latch in Figs. I and II. Inthis-case the latchjis designated by the numeral 20a, and, as shown,comprises two duplicate brackets 21a which are adapted to be secured inspaced relation to the swinging edge 13a of the sash 12a by screws 22a.Each bracket 21a has associated with it a sliding bolt 23a and anactuating lever 26a.

which is intergeared` with the bolt 23a in the same manner as describedin connection with the form o-latch in Figs. I and II. As shown in Fig.IV, the two levers 26al are joined at theirouter ends by. a cross piece31a designed to serve asa grasp handle. 'Ihe cross piece 31a may beintegrally'formed with the levers 26a, or, as shown, it may be in theform of a tube whereof the opposite ends engage aligned bosses 33V onthe levers 26a and held in place by an axial rod 34 which is headed overon the outsides of said levers as at 35.

The modification of my latch illustrated in Fig. V is intended for usein connection with vent or transom sashes. The construction here isidentical with that of the latch of Figs. I and II except as to the formof the actuating member 26?), which, in this case, instead of having atransverse grasp 31, is provided with an eye 36 for engagement by avhookpole 37 Vsuch as is ordinarily used with slide sash windows to moveupper sashes that cannot be conveniently reached otherwise. To avoid thenecessity for duplicate description, all thecorresponding parts of thelatch shown in Fig. V are identified with the same reference numeralspreviously emthe'position indicated by dot-and-dash lines pidyed Wahdddiddn, however, df' the sutscript b.

I-Iaving thus described my invention, I A

claim:

1. A pivot sash window latch comprising a bracket with provisions' forsecuring it to a swinging edge ot' the window sash; a bolt having gearteeth ,slidably-guided, inv the bracket and adaptedV to lock over Ythe.rail of the window trame against which the swinging edgeof the sashcloses, andan actuating member with gear teeth concentric to its pivotaxisintermeshingthe rack teeth on said bolt,

said member also embodying a stop for engagement by'the bolt in limitingupward movement or the actuating member.

2. A pivot sash window latch comprising a bracket with provisions forsecuring it to a swinging edge of the window sash; a bolt with a numberof gear teeth and adapted for sliding guidance in the bracket to lockover the rail of the window frame against which the swinging edge of thesash closes; an actu ating memberwith fulcrum connectionon the bracketand having gear teeth concentric with its fulcrum axis to intermesh therackteeth on said bolt, and said member embodying a' stop at one end ofthe gear teeth for engagement by the bolt in limiting movement of theactuating member.

3. A pivot sash window latch comprising a bracket with-provisions forsecuring it to a swinging edge of the pivoted sash; a bolt withconsecutive-gear teeth and adapted for sliding guidance -in the bracketto lock over the rail of the window frame against which theY .swingingedge of the sash closes; an actuating member intergeared with the bolt,said member being in the form of a lever with fulbodying a stop at oneend of the gear teeth for' engagement by the bolt in limiting upwardmovement of the actuating-member. y

, 4. A pivot sash window latch comprising a pair of brackets adapted tobe secured in spaced relation to the swinging edge of the pivoted sash;bolts each embodying consecutive teeth and adapted for sliding guidancerespectively in the brackets to llock over the rail of the windowframeagainst which the swinging edge ofthe sash closes; actuating leverswith fulcrum connection on the bracketsV and having gear teethconcentricl with their fulcrum axes to intermesh with rack teeth on saidbolts, said levers each having `a stop for co-action with the associatedbolt in limiting movement of actuating levers; and a transverse'handleconnecting the two levers at their outer ends and constituting a graspto facilitate impartation of thrust and pull closing it.

5. A pivot sash Window latch comprising a bracket With provisions forsecuring it to a swinging edge of the Window sash; abolt withconsecutive gear teeth and adapted for sliding guidance in the bracketto lock over the rail of the Window frame against which the swingingedge of the sash closes an actuating member in the form of a lever Withfulcrum connection on the bracket and lying parallel to the plane of thesash When the latter is locked closed, said member having gear teethconcentric with its fulcrum axis to intermesh With rack teeth on thebolt; and an integrally formed stop intermediate the lever shank andgear teeth for engagement with the bolt head in limiting upward movementof said lever to the sash locking position aforesaid.

In testimony whereof, I have hereunto signed my name at Philadelphia,Pennsyl- Vania, this 30th day of April, 1930.

HOWARD T. WALTON.

